JP5878810B2 - Hydroelectric generator - Google Patents

Description

  The present invention relates to a hydroelectric generator.

  In a device that uses a solenoid valve to urinate urinal wash water and a water faucet that can be lit when water is discharged, a hydroelectric generator is installed in the water passage, and power is generated by a part of the water energy at the time of water discharge. There is a faucet device that uses the electric power for driving an electromagnetic valve or illumination (for example, Patent Document 1).

JP 2005-113437 A

  A claw-pole type is often used as a hydraulic power generator applied to a conventional faucet device, but this method requires a cylindrical multipolar magnet in the watertight part. Cylindrical multipolar magnets need to be sintered by a mold, and the range of material selection is limited due to problems of water resistance and safety (especially when used for water purification). As described above, in the conventional hydroelectric generator, there are many restrictions on the conditions of the magnets applied as the constituent elements, resulting in high costs.

  This invention is made | formed in view of the above, Comprising: It aims at providing the hydraulic generator which can ease the conditions of the magnet applied as a component and can aim at cost reduction.

  In order to solve the above-described problems, a hydroelectric generator according to the present invention is provided with a pair of in-channel magnetism portions that are provided opposite to each other with a single axis in the water channel and rotate around the one axis by a water flow, and an N pole. Between the one of the in-channel magnetism part, the other side of the in-channel magnetism part, the permanent magnet fixed to the outside of the water channel so as to be able to face simultaneously, and the in-channel magnetism part It is characterized by comprising a winding magnetism portion fixed outside the water channel so as to be able to receive and transmit the magnetic flux of the permanent magnet, and a power generation coil wound around the winding magnetism portion.

  The hydroelectric generator may further include a water shielding plate provided between the magnetic guide portion in the water channel and the permanent magnet and the magnetic guide portion for winding, and the water shielding plate is disposed in the water channel. It is preferable that a clearance is provided between the magnetism portion.

  In the hydraulic power generator according to the present invention, since the permanent magnets of the constituent elements are fixed outside the water channel, the conditions of the magnets applied as the constituent elements can be relaxed, and the cost can be reduced.

FIG. 1 is an exploded perspective view showing a schematic configuration of a hydroelectric generator according to an embodiment of the present invention. FIG. 2 is a schematic diagram for explaining the transition of the flow of magnetic flux generated with the rotation of the turbine in the hydraulic power generator according to the embodiment of the present invention. FIG. 3 is a perspective view showing an example of another configuration of the permanent magnet and the magnet-side magnetism guide portion in FIG.

  Hereinafter, embodiments of a hydroelectric generator according to the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated. Moreover, in the following description, the up-down direction and the left-right direction of a figure are demonstrated as the up-down direction and left-right direction of a component.

  First, with reference to FIG. 1, the structure of the hydraulic power generator which concerns on one Embodiment of this invention is demonstrated. FIG. 1 is an exploded perspective view showing a schematic configuration of a hydroelectric generator according to an embodiment of the present invention.

  The hydroelectric generator 1 according to the present embodiment is applied to a faucet device that generates electric power using a part of water energy at the time of water discharge and uses the electric power for control of components. Examples of such faucet devices include a device that discharges urinal flush water with an electromagnetic valve, and a water faucet that can turn on illumination when water is discharged.

  As shown in FIG. 1, the hydroelectric generator 1 according to the present embodiment includes a generator case 2, a water turbine 3 (and a water guide portion 4 a and 4 b), a water shielding plate 5, a permanent magnet 6, and a magnet side. The magnetic conducting part 7, the winding magnetic conducting part 8 and the power generating coil 9 are assembled to each other.

  The generator case 2 has a cylindrical shape having a bottom surface 2a, and has an opening 2b on the side opposite to the bottom surface 2a (upward in FIG. 1). The generator case 2 incorporates the water wheel 3, the water shielding plate 5, the permanent magnet 6 and the magnet side magnetism guide portion 7, the winding magnetism guide portion 8 and the power generation coil 9 from the opening 2b. .

  An inflow port 10 through which a water flow flows into the case is communicated with the inner peripheral surface 2 c of the generator case 2. Further, the bottom surface 2a of the generator case 2 is formed with an outlet 11 through which the water flow that flows into the case flows out to the outside of the case. That is, in the generator case 2, a water channel is formed through which a water flow from the inlet 10 of the inner peripheral surface 2c toward the outlet 11 of the bottom surface 2a is passed.

  An axial flow type water turbine 3 is rotatably accommodated in the generator case 2. The water turbine 3 includes a base portion 3a, a shaft 3b, and a plurality of blades 3c. The base 3a has a shape that can rotate around the shaft 3b in the generator case 2, and is a disk member having a diameter smaller than the inner diameter of the generator case 2 as shown in FIG.

  The shaft 3b extends from the base 3a to the bottom surface 2a of the generator case 2 (in FIG. 1, downward from the bottom surface of the base) and is pivotally supported by the bottom surface 2a of the generator case 2 during assembly. In the example of FIG. 1, the shaft 3 b is provided at the center of the circular base 3 a and is pivotally supported at the center of the bottom surface 2 a of the generator case 2. That is, in the example of FIG. 1, the rotation axis of the water turbine 3 is the center of the base portion 3a.

  The plurality of blades 3c extend from the base 3a toward the bottom surface 2a of the generator case 2 in the same manner as the shaft 3b. Each of the plurality of blades 3c is arranged at substantially equal intervals along the circumferential direction around the shaft 3b.

  The installation position and shape of the blade 3c of the turbine wheel and the installation positions of the inlet 10 and the outlet 11 of the generator case 2 are such that a rotational force can be applied to the turbine 3 by the water flow in the water channel in the generator case 2. Is set to That is, the water turbine 3 can rotate about the shaft 3b as the rotation axis c by the water flow in the water channel from the inlet 10 to the outlet 11 in the generator case 2.

  A pair of in-channel magnetic guide portions 4a and 4b are embedded in a surface 3d of the base 3a of the water turbine 3 on the side opposite to the surface facing the bottom surface 2a of the generator case 2 (upward in FIG. 1).

  Each of the in-water channel magnets 4 a and 4 b is an electromagnetic steel plate formed in a semi-annular shape, and is provided so as to face the rotation axis c of the water turbine 3. In other words, the in-channel magnetic guide portions 4a and 4b are arranged on the surface 3d so as to divide the annular plate material into two and separate them by a certain distance. In addition, magnetic stainless steel having rust prevention property may be used for the in-channel magnetic conducting portions 4a and 4b. Moreover, you may comprise the in-channel magnetically-conductive part 4a, 4b so that a magnetic path cross-sectional area may become large by overlapping several sheets in the thickness direction (up-down direction in FIG. 1).

  Since the in-channel magnetically conductive portions 4a and 4b are embedded in the base 3a of the water turbine 3, they are fixed in a state of rotating integrally with the water turbine 3 with the shaft 3b of the water turbine 3 as the rotation axis c. That is, the in-water channel magnetism portions 4a and 4b are provided in the water channel inside the generator case 2 so as to face each other with the rotation axis c (one axis) of the water wheel interposed therebetween, and rotate around the rotation axis c by the water flow in the water channel. Arranged as possible. In the following description, the pair of in-channel magnetic guide portions 4a and 4b are collectively referred to as the in-channel magnetic guide portion 4.

  A water shielding plate 5 is disposed at a position facing the surface 3 d of the base 3 a of the water turbine 3. The water shielding plate 5 is a disc member having a diameter substantially the same as the outer diameter of the opening 2b of the generator case 2, and is made of a nonmagnetic material. Moreover, the water shielding board 5 has rust prevention property.

  The water shielding plate 5 is disposed so as to completely cover the opening 2 b of the generator case 2, and is fixed to the generator case 2. The water shielding plate 5 and the generator case 2 are sealed in a watertight manner by a seal member (not shown) such as a rubber packing, for example, and the water flow through the water channel in the generator case 2 leaks from the opening 2b. It is prevented from coming out. That is, the inside of the generator case 2 sealed by the water shielding plate 5 can be defined as the inside of the water channel, and the outside thereof can be defined as the outside of the water channel.

  Further, the water shielding plate 5 is installed with a predetermined clearance between the water turbine base 3a (that is, the in-channel magnetic guide portions 4a and 4b) to prevent contact with the water turbine 3 and to rotate the water turbine 3 in a rotational load. It is configured not to give.

  On the opposite side of the water turbine 3 with the water shielding plate 5 interposed therebetween (upward in FIG. 1), a permanent magnet 6 has an N pole as one of the in-channel magnetism conducting parts 4a and 4b, and an S pole as the in-channel magnetism. It is fixed so that it can oppose simultaneously with the other of the parts 4a and 4b.

  More specifically, the permanent magnet 6 can be opposed to the in-water channel magnets 4 a and 4 b via the magnet side magnets 7. The magnet-side magnetism conducting unit 7 includes an N-pole-side magnet plate 7 a that is fixed in contact with the N-pole surface of the permanent magnet 6, and an S-pole-side magnet that is fixed in contact with the S-pole surface of the permanent magnet 6. And a plate 7b. The magnet side magnetic conduction part 7 is an electromagnetic steel plate.

  The N-pole side magnetic guide plate 7a and the S-pole side magnetic guide plate 7b have opposing surfaces 7c and 7d, respectively. The opposing surface 7c functions as an N pole and the opposing surface 7d functions as an S pole. The magnet-side magnetism conducting part 7 and the permanent magnet 6 connected and fixed thereto are located at positions where the opposing surfaces 7c and 7d face the in-water channel magnetizing parts 4a and 4b with the water shielding plate 5 interposed therebetween. It is fixed to a support member (not shown). In the following description, the facing surface 7c of the N pole side magnetic plate 7a is also referred to as “N pole surface 7c”, and the facing surface 7d of the S pole side magnetic plate 7b is also referred to as “S pole surface 7d”. The

  The installation positions of the N-pole surface 7c and the S-pole surface 7d are on the rotation path of the in-channel magnetic guide portions 4a and 4b, and the N-pole surface 7c and one of the in-channel magnetic guide portions 4a and 4b and the S-pole surface 7d. Is a position that opposes the other of the in-channel magnetically conductive portions 4a and 4b at the same time. In the example shown in FIG. 1, the permanent magnet 6 is disposed on the rotation axis c of the water wheel 3 (and the in-channel magnetic guide portions 4 a and 4 b), and the N-pole surface 7 c and the S-pole surface 7 d have a diameter from the rotation axis c. They are arranged equidistantly on the opposite side.

  With such an arrangement of the magnet side magnetism guide section 7, when the pair of in-channel magnetism-guide sections 4a and 4b are rotationally moved along with the rotation of the water wheel 3, (1) the N pole surface 7c is in-channel magnetism-guide section. 4a, the S pole surface 7d facing the in-water channel magnet 4b, and (2) the N pole surface 7c facing the in-channel magnet 4b, and the S pole 7d in the channel magnet. The state facing 4a is repeated alternately.

  Therefore, the permanent magnet 6 is opposed to the N pole at one of the in-channel magnetisms 4a and 4b and the S pole at the same time as the other of the in-channel magnetisms 4a and 4b through the magnet side magnetism 7. It will be fixed as possible.

  Further, the permanent magnet 6 is placed on the opposite side (upward in FIG. 1) from the water wheel 3 with the water shielding plate 5 sandwiched between the N pole side magnetic guide plate 7a and the S pole side magnetic guide plate 7b of the magnet side magnetic guide portion 7. Since it is fixedly installed, it is disposed outside the water channel in the generator case 2. For this reason, since the permanent magnet 6 does not come into contact with water, it is not necessary to consider water resistance, heat resistance, water safety, etc., and a high-magnetism neodymium magnet, a summer coke magnet, a ferrite magnet, or the like can be applied. .

  On the side opposite to the water wheel 3 (upward in FIG. 1) with the water shielding plate 5 interposed therebetween, a winding magnetism guide portion 8 around which a power generation coil 9 is wound is fixed.

  The winding magnetic conducting part 8 is an electromagnetic steel plate, and is an arch-shaped member straddling the permanent magnet 6 and the magnet side magnetic conducting part 7. The winding magnetism part 8 has opposing surfaces 8a and 8b at both ends of the arch shape. Similarly to the magnet side magnetism portion 7, the winding magnetism portion 8 is also illustrated at a position where the opposed surfaces 8a and 8b face the in-water channel magnetism portions 4a and 4b with the water shielding plate 5 interposed therebetween. Not fixed to the supporting member.

  The installation positions of the opposing surfaces 8a and 8b of the winding magnetism conducting part 8 are on the rotation path of the in-channel magnetism guiding parts 4a and 4b, as in the magnet side magnetizing part 7, and the opposing surface 8a is inducted into the channel. It is a position where one of the magnetic parts 4a and 4b and the facing surface 8b face each other simultaneously with the other of the in-channel magnetic guiding parts 4a and 4b. In the example shown in FIG. 1, the facing surfaces 8a and 8b of the winding magnetism portion 8 are opposed to each other across the rotation axis c of the water turbine 3 (and the in-channel magnetism portions 4a and 4b). , 8b are arranged equidistant from the rotation axis c on the opposite side in the radial direction.

  With the arrangement of the winding electromagnetic part 8, when the pair of in-channel magnetic guiding parts 4 a and 4 b rotate with the rotation of the water turbine 3, (3) the facing surface 8 a is in the in-channel magnetic guiding part 4 a. A state in which the facing surface 8b faces the in-water channel magnetized portion 4b, and (4) the facing surface 8a faces the in-water channel magnetized portion 4b, and the facing surface 8b faces the in-channel magnetized portion 4a. The state is repeated alternately.

  Further, the installation positions of the opposing surfaces 8 a and 8 b of the winding magnetism conducting portion 8 are separated from the N pole surface 7 c and the S pole surface 7 d of the magnet side magnetism guiding portion 7. A line segment that connects the installation positions of the opposing surfaces 8a and 8b of the winding magnet part 8 is orthogonal to a line segment that connects the N pole surface 7c and the S pole surface 7d of the magnet side magnet part 7. Is preferably arranged. In the example shown in FIG. 1, the N pole surface 7 c of the magnet side magnetism 7, the facing surface 8 a of the coil magnetism 8, the S pole surface 7 d of the magnet magnetism 7, and the coil magnetism 8 Are arranged at substantially equal intervals along the circumferential direction of the water shielding plate 5 in the order of the opposite surfaces 8b. Note that the N-pole surface 7c and the S-pole surface 7d of the magnet-side magnetism-conducting portion 7 and the opposing surfaces 8a and 8b of the winding magnetism-conducting portion 8 are all rectangular in this embodiment and have substantially the same area. .

  The winding magnetism guide part 8 is fixedly spaced from the magnet side magnetism part 7 and is configured so that the magnetic flux of the permanent magnet 6 cannot be directly transferred from the magnet side magnetism part 7. When the in-water channel magnet 4 is in the state shown in (1) or (2) above and receives the magnetic flux of the permanent magnet 6 from the magnet side magnet 7, the winding magnet 8 is When it is in the state of (3) or (4), the magnetic flux of the permanent magnet 6 can be exchanged with the in-water channel magnetism part 4.

  Next, the operation of the hydroelectric generator according to the present embodiment will be described with reference to FIG.

  FIG. 2 is a schematic diagram for explaining the transition of the flow of magnetic flux generated with the rotation of the water turbine 3 in the hydroelectric generator of the present embodiment. In the schematic diagrams (a) to (f) shown in FIG. 2, the N pole surface 7 c of the magnet side magnetism portion 7 is downward, the S pole surface 7 d of the magnet side magnetism portion 7 is upward, and the winding guide is on the left side. The fixed position of the opposing surface 8a of the magnetic part 8 and the opposing surface 8b of the coiling part 8 for winding are shown on the right. Moreover, in each of the schematic diagrams (a) to (f) of FIG. 2, the positions of the in-channel magnetic guide portions 4 a and 4 b in a state where the water wheel 3 and the in-channel magnetic guide portion 4 are rotated counterclockwise are shown. The time series changes are represented in the order of (a) → (b) → (c) → (d) → (e) → (f). Moreover, the arrow A in FIG. 2 represents the direction of the magnetic flux of the permanent magnet 6 that flows in the coiled portion 8 for winding, and represents the amount of magnetic flux by its length.

The schematic diagram (a) of FIG. 2 represents the following state.
The N-pole surface 7c of the magnet side magnetism conducting portion 7 and the facing surface 8b of the winding magnetism guiding portion 8 are opposed to the in-water channel magnetizing portion 4b.
The S pole surface 7d of the magnet side magnetism conducting part 7 and the facing surface 8a of the coiling magnetism part 8 are opposed to the in-water channel magnetizing part 4a.

  In the state of the schematic diagram (a), the flow of the magnetic flux of the permanent magnet 6 is as follows: N-pole side magnetic plate 7a → N-pole surface 7c → magnet-side magnetic guide portion 4b → winding magnetism Opposing surface 8b of portion 8 → winding magnetism portion 8 → facing surface 8a of winding magnetism portion 8 → water channel magnetism portion 4a → S pole surface 7d of magnet side magnetism guide portion 7 → S pole side The magnetic conducting plate 7 b → the permanent magnet 6.

  In the winding magnetism part 8, the magnetic flux flows from the facing surface 8b to the facing surface 8a. In the example of the schematic diagram (a), the flow is in the left direction as indicated by the arrow A. Further, since the entire N pole surface 7c of the magnet side magnetism conducting portion 7 is opposed to the in-water channel magnetizing portion 4b, the amount of magnetic flux flowing in the winding magnetism guiding portion 8 is the largest.

The schematic diagram (b) of FIG. 2 represents the following state.
The N-pole surface 7c of the magnet side magnetism conducting part 7 is opposed to both the in-channel magnetism part 4a and the in-channel magnetism part 4b, and is opposed to the in-channel magnetism part 4b in a larger area. .
The S-polar surface 7d of the magnet side magnetic conducting part 7 is opposed to both the in-channel magnetic conducting part 4a and the in-channel magnetic conducting part 4b, and is opposed to the in-channel magnetic conducting part 4a in a larger area. .
The opposed surface 8a of the winding magnetism conducting portion 8 is opposed to the in-water channel magnetizing portion 4a.
The opposed surface 8b of the winding magnetism conducting portion 8 faces the in-water channel magnetizing portion 4b.

  In the state of the schematic diagram (b), the flow of the magnetic flux of the permanent magnet 6 is the same as that of the state of the schematic diagram (a), but only a part of the N pole surface 7c of the magnet-side magnetically conductive portion 7 is in the waterway magnetically conductive portion. Since it is opposed to 4b, the amount of magnetic flux flowing in the winding magnetic guide 8 is reduced as compared with the state of the schematic diagram (a) as shown by the arrow A.

The schematic diagram (c) of FIG. 2 represents the following state.
The N-pole surface 7c of the magnet side magnetism conducting part 7 is opposed to both the in-channel magnetism part 4a and the in-channel magnetism part 4b, and is opposed to the in-channel magnetism part 4a in a larger area. .
The S pole surface 7d of the magnet side magnetism portion 7 is opposed to both the in-channel magnetism portion 4a and the in-channel magnetism portion 4b, and is opposed to the in-channel magnetism portion 4b in a larger area. .
The opposed surface 8a of the winding magnetism conducting portion 8 is opposed to the in-water channel magnetizing portion 4a.
The opposed surface 8b of the winding magnetism conducting portion 8 faces the in-water channel magnetizing portion 4b.

  In the state of the schematic diagram (c), the flow of magnetic flux of the permanent magnet 6 is as follows. N-pole side magnetic plate 7a → N-pole surface 7c → magnet-side magnetic guide portion 4a → winding magnetism Opposing surface 8a of portion 8 → winding magnetism portion 8 → facing surface 8b of winding magnetism portion 8 → inside water channel magnetism portion 4b → S pole surface 7d of magnet side magnetism guide portion 7 → S pole side The direction is changed from the magnetic conducting plate 7 b to the permanent magnet 6.

  In the winding magnetism part 8, the magnetic flux flows from the facing surface 8a to the facing surface 8b, and in the example of the schematic diagram (c), the flow is switched to the right direction as indicated by the arrow A. Similarly to the state of the schematic diagram (b), only a part of the N pole surface 7c of the magnet-side magnetism conducting portion 7 is opposed to the in-water channel magnetizing portion 4a. The amount is small compared to the state of the schematic diagram (a).

The schematic diagram (d) of FIG. 2 represents the following state.
The N pole surface 7c of the magnet side magnetism conducting part 7 and the facing surface 8a of the coiling magnetism part 8 are opposed to the in-water channel magnetizing part 4a.
The S pole surface 7d of the magnet side magnetism 7 and the facing surface 8b of the winding magnetism 8 are opposed to the in-channel magnetism 4b.

  In the state of the schematic diagram (d), the flow of the magnetic flux of the permanent magnet 6 is the same as that of the state of the schematic diagram (c), but the entire N pole surface 7c of the magnet side magnetic guiding part 7 is the in-water channel magnetic part. Since it is opposed to 4a, the amount of magnetic flux flowing in the winding magnetism guide portion 8 increases as compared with the state of the schematic diagram (c) as shown by an arrow A.

The schematic diagram (e) of FIG. 2 represents the following state.
The N pole surface 7c of the magnet side magnetism conducting portion 7 is opposed to the in-water channel magnetism portion 4a.
The S pole surface 7d of the magnet side magnetism conducting portion 7 is opposed to the in-water channel magnetism portion 4b.
The facing surface 8a of the winding magnetism portion 8 is opposed to both the in-channel magnetism portion 4a and the in-channel magnetism portion 4b, and is opposed to the in-channel magnetism portion 4a in a larger area. .
The facing surface 8b of the winding magnetism portion 8 is opposed to both the in-channel magnetism portion 4a and the in-channel magnetism portion 4b, and is opposed to the in-channel magnetism portion 4b in a larger area. .

  In the state of the schematic diagram (e), the flow of the magnetic flux of the permanent magnet 6 is the same as that of the state of the schematic diagram (d), but only a part of the facing surface 8a of the coiling part 8 for winding is in the waterway. Since it opposes the portion 4a, the amount of magnetic flux flowing into the winding magnetism guide portion 8 is reduced as compared with the state of the schematic diagram (d) as shown by the arrow A.

The schematic diagram (f) in FIG. 2 represents the following state.
The N pole surface 7c of the magnet side magnetism conducting portion 7 is opposed to the in-water channel magnetism portion 4a.
The S pole surface 7d of the magnet side magnetism conducting portion 7 is opposed to the in-water channel magnetism portion 4b.
The facing surface 8a of the winding magnetism portion 8 faces both the in-water channel magnet portion 4a and the in-water channel magnet portion 4b, and faces the in-channel magnetism portion 4b in a larger area. .
The facing surface 8b of the winding magnetism guide part 8 is opposed to both the in-channel magnetism part 4a and the in-channel magnetism part 4b, and is opposed to the in-channel magnetism part 4a in a larger area. .

  In the state of the schematic diagram (f), the flow of magnetic flux of the permanent magnet 6 is as follows: N-pole side magnetic plate 7a → N-pole surface 7c of the magnet-side magnetic guide part 7 → magnetic guide part 4a in the water channel → winding magnetism. Opposing surface 8b of portion 8 → winding magnetism portion 8 → facing surface 8a of coiling magnetism portion 8 → inside channel magnetism portion 4b → S pole surface 7d of magnet side magnetism guide portion 7 → S pole side The direction is changed from the magnetic conducting plate 7 b to the permanent magnet 6.

  In the winding magnetism part 8, the magnetic flux flows from the facing surface 8b to the facing surface 8a, and in the example of the schematic diagram (f), the flow is switched to the left direction as indicated by an arrow A. Further, since only a part of the facing surface 8b of the winding magnetism portion 8 faces the in-channel magnetism portion 4a, the amount of magnetic flux flowing into the winding magnetism portion 8 is the same as in the schematic diagram (e). Few.

  As shown by the arrows A in the schematic diagrams (a) to (f) of FIG. 2, the inside of the channel magnetism part 8 for winding is caused by the rotation of the in-water channel magnetism parts 4 a and 4 b with the rotation of the water turbine 3. The flow direction of the magnetic flux of the passing permanent magnet 6 is periodically switched, whereby the direction of the current generated in the power generating coil 9 is also periodically switched.

  Next, the effect of the hydroelectric generator according to this embodiment will be described.

  The hydroelectric generator 1 according to the present embodiment is provided in a water channel so as to face the rotation axis c, and a pair of in-channel magnetism-directing portions 4a and 4b that rotate around the rotation axis c by a water flow and the N pole in the water channel. A permanent magnet 6 fixed to the outside of the water channel so that one of the inner magnetic parts 4a, 4b and the other of the inner magnetic channel parts 4a, 4b can be opposed to each other at the same time; , 4b, a winding magnetism portion 8 fixed outside the water channel so as to be able to exchange the magnetic flux of the permanent magnet 6, and a power generation coil 9 wound around the winding magnetism portion 8. Prepare.

  With this configuration, the N pole of the permanent magnet 6 faces one of the in-channel magnetism portions 4a and 4b, the S pole faces the other of the in-channel magnetism portions 4a and 4b, and the winding magnetism portion 8 When the magnetic flux of the permanent magnet 6 can be exchanged between the in-channel magnetically conductive portions 4a and 4b, electric power can be generated in the power generation coil 9. In the hydroelectric generator 1 of the present embodiment, the permanent magnet 6 as a constituent element is fixed outside the water channel, and the permanent magnet 6 is not arranged in the water channel unlike the conventional hydroelectric generator. This makes it possible to apply a general-purpose cube-shaped magnet, eliminating the need for a dedicated mold investment. In addition, since the permanent magnet 6 does not come into contact with water, it is not necessary to consider water resistance, heat resistance, and water safety. For example, it is possible to adopt a neodymium magnet that has high magnetic force but is easily rusted. The number can be increased. As a result, it is possible to relax the conditions of the magnet to be applied as a constituent element, and it is possible to reduce the cost.

  Further, the hydroelectric generator 1 of the present embodiment includes a water shielding plate 5 provided between the in-water channel magnetism parts 4a and 4b and the permanent magnet 6 and the coil magnetism part 8 for winding. The water shielding plate 5 is disposed with a clearance between the in-channel magnetic guide portions 4a and 4b. With this configuration, the rotation of the in-channel magnetic guide portions 4a and 4b is suppressed by contact with the water shielding plate 5, and it is possible to prevent the flow rate from being lowered by giving resistance to the water flow.

  As mentioned above, although embodiment of this invention was described, the said embodiment was shown as an example and is not intending limiting the range of invention. The above-described embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The above-described embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof, as long as they are included in the scope and gist of the invention.

  For example, in the said embodiment, although the hydroelectric generator 1 illustrated the structure provided with a pair of in-channel magnetism part 4a, 4b, the in-channel magnetism part 4 should just be a pair, and several pairs of in-channel magnetism are sufficient. It is good also as a structure provided with the part 4. FIG. Even in this case, each pair of the plurality of pairs of in-channel magnetic guide portions 4 is provided in the water channel inside the generator case 2 so as to face each other with the rotation axis c of the water turbine 3 interposed therebetween. It is arranged so as to be rotatable around the rotation axis c.

  In the above embodiment, the N-pole surface 7c and the S-pole surface 7d of the magnet-side magnetism conducting portion 7 and the opposing surfaces 8a and 8b of the winding magnetism-guiding portion 8 are all rectangular and have substantially the same area. However, as long as it is possible to exchange magnetic flux with the in-water channel magnetism part 4, other shapes such as a fan shape may be used, and the areas may be different. Moreover, a single board | plate material or a block may be sufficient, and you may comprise by laminating | stacking an electromagnetic steel plate.

  Moreover, although the said embodiment illustrated the structure which connects the N pole side magnetism plate 7a and the S pole side magnetism plate 7b of the magnet side magnetism part 7 to the single permanent magnet 6, the permanent magnet 6 was illustrated. However, other configurations may be used as long as the N pole can be simultaneously opposed to one of the in-channel magnetism portions 4a and 4b and the S pole can be opposed to the other of the in-channel magnetism portions 4a and 4b. For example, as shown in FIG. 3, in the above-described embodiment, the N pole is arranged with the N pole face 7 c of the N pole side magnetic guide plate 7 a fixed to the in-channel magnetic guide section 4 side. Permanent magnet 6a and a second permanent magnet 6b arranged with the S pole facing the in-water channel magnet 4 at the fixed position of the S pole surface 7d of the S pole side magnetic guide plate 7b. And it is good also as a structure which connects the 1st permanent magnet 6a and the 2nd permanent magnet 6b with the magnetic guide plate 17. FIG.

DESCRIPTION OF SYMBOLS 1 Hydroelectric generator 4,4a, 4b Magnetic guide part in water channel 5 Water shielding board 6 Permanent magnet 8 Winding magnetism part 9 Power generating coil c Rotation axis (one axis)

Claims (2)

A pair of in-channel magnetism portions that are provided opposite to each other with a single axis in the water channel and rotate around the one axis by a water flow;
A permanent magnet fixed to the outside of the water channel so that the N pole can be opposed to one side of the in-water channel magnetism part and the S pole can be simultaneously opposed to the other of the in-water channel magnetism part;
A winding magnetism part fixed outside the waterway so as to be able to exchange the magnetic flux of the permanent magnet with the magnetism part in the waterway;
A coil for power generation wound around the magnetism part for winding;
A hydroelectric generator characterized by comprising: A water shielding plate provided between the in-water channel magnetism part and the permanent magnet and the coil magnetism part;
The hydroelectric generator according to claim 1, wherein the water shielding plate is disposed with a clearance between the water guide plate and the inductive magnetic guide portion.

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